The Mistake occurrence is located about 4.7 kilometres from the west shore of Surprise Lake, near its north end, approximately 30 kilometres northeast of the community of Atlin.

A northeast trending limonitic shear and fracture zone cuts alaskite of the Late Cretaceous Surprise Lake batholith (Surprise Lake Plutonic Suite). The alaskite, which is coarse grained to porphyritic, lies in contact with Upper Mississippian to Permian Cache Creek Complex ultramafic rocks and contains pendants and screens of Cache Creek Complex volcanics and sediments.

Within the shear zone are veins of quartz containing minor arsenopyrite, galena, sphalerite, chalcopyrite, manganese, fluorite, and possibly zeunerite. In 1978, a sample of a vein assayed 0.04 per cent uranium, 20 grams per tonne silver, and 0.4 gram per tonne gold (Assessment Report 7480).

The Mistake and Shear claims were staked after the joint federal and provincial government geochemical data release in 1978. The claims were prospected for uranium in 1978 and briefly in August 1979. This work resulted in the discovery of radioactive float near the common boundary of the Mistake and Shear mineral claims. Silt samples were collected from the claim area and from the area around the claims where they were deemed to be of importance. Seven rock chip samples were also collected from the area. Rock outcrops and float were checked with either spectrometers or Geiger counters.

In 2006, Aldershot Resources Ltd. carried out a spectral analysis program on an area covering several occurrences (D & D (104N 108), Ira 6 (104N 109), Mistake, Ira (104N 110), Ira 5 (104N 088) and Pato 1 (104N 106)). The program involved acquisition of satellite spectral data available from NASA, reconfiguring this data into a workable format, geo-referencing to TRIM map bases and extensive and rigorous classification of the data in search of indicators that might lead to the discovery of uranium mineralization.

In 2017, Global Drilling Solutions on behalf of Zinex Mining Corporation conducted extensive geochemical sampling on the Ruby Creek property, as well as drilling and ground geophysics. Rock sample 1532863 returned 0.12 per cent copper, greater than 1 per cent lead, 0.012 per cent zinc, greater than 10 grams per tonne silver, 0.001 per cent uranium and 0.01 grams per tonne gold (Assessment Report 37171). In 2018, Global carried out further geochemical sampling on the property.

In 2021, an airborne SkyTEM survey was conducted by Stuhini Exploration on the Ruby Creek property, which revealed a number of regional trends across the property.